problème d'aiguille à température sur Torino

Djesi a écrit:J
Quel conseil me donneriez vous pour régler mon trouble. Démonter le cadran serait-il une alternative?

Merci

The coolant temperature gauge works just like the gas gauge. It operates based on the amount of power passing through. We control the ground resistance from the temperature gauge through a sending unit screwed into the engine’s water jacket. Inside the sending unit is a variable resistor just like we have in the fuel tank, only it’s much smaller. The variable resistor is controlled by water temperature and a bimetallic contact. As the engine warms, the bimetallic contact moves across the resistor. And as the engine warms, there is less resistance across the resistor, which allows more power to flow across the gauge to ground. The needle moves toward maximum. If everything is working properly, the needle will climb into the normal zone. But what if the engine overheats? In this case, there is even less resistance across the sending unit to ground, driving the needle toward the dreaded “H.”


If the sending unit is bad, the temperature gauge will be either inoperative or it will climb to H and stay there. Two things can happen to a sending unit. Corrosion inside creates too much resistance, rendering the gauge inoperative. Or there is no resistance, driving the gauge to maximum. As with the fuel gauge, check for power to the temperature gauge first.